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@audioplastic
Created February 22, 2021 13:56
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Pi Pico test script to calculate primes and report status in built in LED every 20 seconds
from machine import Pin, Timer
import utime, math
led = Pin(25, Pin.OUT)
tim = Timer()
pIdx = 0;
x = 0;
latestPrime=0;
def is_prime(n: int) -> bool:
"""Primality test using 6k+-1 opt."""
if n<=3:
return n>1
if n%2 ==0 or n%3==0:
return False
i=5
while i** 2 <=n:
if n%i==0 or n%(i+2)==0:
return False
i+=6
return True
def dah():
led.value(1)
utime.sleep(0.25)
led.value(0)
utime.sleep(0.25)
def dit():
led.value(1)
utime.sleep(0.05)
led.value(0)
utime.sleep(0.25)
def alert_flicker():
for i in range(0,20):
led.value(1)
utime.sleep(0.02)
led.value(0)
utime.sleep(0.02)
utime.sleep(0.5)
def led_binary(myInt):
for char in bin(myInt)[2:]:
if char == '0':
dit()
else:
dah()
def led_dec(myInt):
for char in str(math.floor(myInt/1000.)):
if int(char)>0:
for i in range(int(char)):
dit()
else:
dah()
utime.sleep(0.5)
def disp_latest_prime(timer):
print("prime" , pIdx , " = " , latestPrime)
alert_flicker()
# led_binary(pIdx)
led_dec(pIdx)
led.value(0)
tim.init(freq=0.05, mode=Timer.PERIODIC, callback = disp_latest_prime)
while True:
x+=1
if is_prime(x):
latestPrime=x;
pIdx+=1
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